Pokémon Sun and Moon Special Demo Version: Muk Pokédex Guide

If you searched “Muk” for the Pokémon Sun and Moon Special Demo Version and landed on swamp-fishing setups, “Disorder” abilities, and a number like #092, you got the wrong game. Every one of those terms comes from Pokémon Pokopia, a separate habitat-building life-sim that launched on Nintendo Switch 2 on March 5, 2026. None of it applies to the Alola titles. Here is the clean, sourced answer.

The short version

• Species: Muk — National Pokédex #089 (three digits, not #0089).
• French name: Grotadmorv. (Grimer is Tadmorv.) Muk is not “Muk” in French.
• Type: standard Muk is pure Poison, weak to Ground and Psychic.
• Evolution: Grimer evolves into Muk at level 38.
• Base stats: HP 105 / Attack 105 / Defense 75 / Sp. Atk 65 / Sp. Def 100 / Speed 50.
• Alola form: Alolan Muk is Poison/Dark, introduced in Sun and Moon.
• The demo itself does not hand you Muk. Its headline reward is Ash-Greninja, not a Muk encounter.

What Muk actually is

Muk is the Gen 1 Poison-type sludge Pokémon, National Dex #089. In French it is Grotadmorv — a detail worth nailing down, because mislabeling it “Muk in French” is the single most common error on this topic. Its evolutionary line is simple: Grimer evolves into Muk at level 38. The base stat spread is the long-established one: HP 105 / Attack 105 / Defense 75 / Special Attack 65 / Special Defense 100 / Speed 50, which makes it a slow, fat, hard-hitting Poison attacker rather than a sweeper.

Standard Muk’s abilities are Stench and Sticky Hold, with Poison Touch as its hidden ability. There is no ability called “Disorder” — that label, like the swamp and fishing-rod terms, was pulled in from Pokopia and does not exist in any mainline game.

Alolan Muk: the form that actually matters in Sun and Moon

This is the part the original confusion buried. Sun and Moon introduced the Alolan form of Muk, and it is a genuinely different Pokémon from the Kanto original. Alolan Muk is Poison/Dark, not pure Poison, which changes its defensive profile: the Dark typing removes the Psychic weakness that plagues the standard form and gives it immunity to Psychic-type damage. Its ability pool is also different — Poison Touch, Gluttony, and Power of Alchemy.

So when a Sun and Moon page mentions Muk, the first question is always: standard Muk (#089, pure Poison, weak to Ground and Psychic) or Alolan Muk (Poison/Dark, no Psychic weakness)? They share a Dex number but behave differently in battle, and conflating them is a real mistake — not a localization quirk.

What the Special Demo Version actually contains

The Special Demo Version is a small, self-contained slice of Alola set in Hau’oli City on Mele Mele Island. You are given a Greninja by Ash Ketchum, meet Hau and Professor Kukui, and fight Team Skull. Its signature reward — the reason people downloaded it — is Ash-Greninja, a Greninja with the Battle Bond ability that transforms it in battle. Progress made in the demo, including that Greninja, transfers into the full Sun and Moon games.

That is the demo’s real scope. It is not a Pokédex-completion tool and it is not built around a Muk encounter. If your goal is logging Muk or Grimer, the demo is the wrong place to look; the full games are where the species line lives.

Why “Pokopia” terms keep contaminating this search

Pokémon Pokopia is a different game entirely — a life-simulation title that launched on Nintendo Switch 2 on March 5, 2026, where you restore habitats to attract Pokémon instead of catching them in the wild. Its vocabulary (swamp fishing spots, muddy-water conditions, furniture and “any seat” setups, a “Disorder” trait, and an index like #092) describes that game’s habitat loop. Drop all of it. None of those terms are Sun and Moon mechanics, none describe how Muk is found in Alola, and #092 is not Muk’s number — Muk is #089.

Common mistakes

• Calling Muk “Muk” in French. It is Grotadmorv; Grimer is Tadmorv.
• Writing the Dex number as #0089. Muk is #089 — three digits.
• Treating “Disorder,” swamp fishing, or #092 as Sun and Moon data. All of it is Pokopia, a separate Switch 2 game.
• Conflating standard Muk with Alolan Muk. Standard is pure Poison (weak to Psychic); Alolan is Poison/Dark (immune to Psychic).
• Expecting the demo to give you Muk. The demo’s reward is Ash-Greninja in Hau’oli City, not a Muk encounter.

Practical takeaway

Anchor everything to the species facts: Muk is National Dex #089, Grotadmorv in French, a Poison-type that evolves from Grimer at level 38, with Alolan Muk being the Poison/Dark form Sun and Moon actually added. Ignore any “swamp,” “muddy water,” “Disorder,” or #092 reference — that is Pokopia, not Alola. And remember the demo is about Ash-Greninja, not Muk. Get those straight and the topic stops being a swamp.